Staple cartridge and linear surgical stapler using the staple cartridge

摘要

A linear surgical stitching device comprising: an upper forceps tine, a lower forceps tine, and a staple chamber disposed on the lower forceps tine. Said staple chamber comprises a cutting groove. Disposed inside of the cutting groove is a cutter that moves back and forth along the axis of the cutting groove. Said cutter comprises a blade disposed at the far end of the cutter and a cutter bottom surface. The invention is characteristic in that: disposed inside of said staple chamber are a sliding block and a spring position block element; arranged at the far end of the bottom of the staple chamber is a housing space for housing said sliding block; said staple chamber assembly has an initial state and a firing state; when said staple chamber assembly is in the initial state, said sliding block is on top of the spring position block element and applies a force restricting the top of said spring position block element to be above the plane of the cutter bottom surface, and the near end of the sliding block connects with the far end of the cutter; when said staple chamber assembly is in the firing complete state, said sliding block remains at the far end of the staple chamber so that the top of said spring position block element is above the cutter bottom surface and comes into contact with the far end of the cutter, thereby preventing the cutter from sliding toward the far end of the staple chamber. Compared to the prior art, the present invention provides the advantage of simple structure, and prevents misfiring throughout the whole operation from the completion of a firing to the exchange of a new staple chamber, thereby eliminating the possibility of misfiring after a first firing and providing more safety.